The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 2014
Filed:
Aug. 29, 2013
Chinyuan Wei, Miaoli, TW;
Shiueshr Jiang, Changhua, TW;
Chinyuan Wei, Miaoli, TW;
Shiueshr Jiang, Changhua, TW;
Richtek Technology Corporation, Chupei, Hsinchu, TW;
Abstract
The invention provides a bidirectional level shifter which includes: a first signal terminal; a second signal terminal; a first switch, coupled between the first signal terminal and ground; an inverter receiving a signal from the first signal terminal; a Schottky diode including an anode and a cathode, the anode receiving a signal from the second signal terminal; a second switch, coupled between the cathode of the Schottky diode and the ground; a comparing circuit, comparing a reference voltage and a voltage at the second signal terminal to control the first switch, wherein the reference voltage is lower than a forward bias voltage of the Schottky diode; a first voltage source coupled to the first common node; and a second voltage source coupled to the second common node.